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  1.  
  2. # This module defines
  3. # SDL2_LIBRARY, the name of the library to link against
  4. # SDL2_FOUND, if false, do not try to link to SDL2
  5. # SDL2_INCLUDE_DIR, where to find SDL.h
  6. #
  7. # This module responds to the the flag:
  8. # SDL2_BUILDING_LIBRARY
  9. # If this is defined, then no SDL2main will be linked in because
  10. # only applications need main().
  11. # Otherwise, it is assumed you are building an application and this
  12. # module will attempt to locate and set the the proper link flags
  13. # as part of the returned SDL2_LIBRARY variable.
  14. #
  15. # Don't forget to include SDLmain.h and SDLmain.m your project for the
  16. # OS X framework based version. (Other versions link to -lSDL2main which
  17. # this module will try to find on your behalf.) Also for OS X, this
  18. # module will automatically add the -framework Cocoa on your behalf.
  19. #
  20. #
  21. # Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your configuration
  22. # and no SDL2_LIBRARY, it means CMake did not find your SDL2 library
  23. # (SDL2.dll, libsdl2.so, SDL2.framework, etc).
  24. # Set SDL2_LIBRARY_TEMP to point to your SDL2 library, and configure again.
  25. # Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value
  26. # as appropriate. These values are used to generate the final SDL2_LIBRARY
  27. # variable, but when these values are unset, SDL2_LIBRARY does not get created.
  28. #
  29. #
  30. # $SDL2DIR is an environment variable that would
  31. # correspond to the ./configure --prefix=$SDL2DIR
  32. # used in building SDL2.
  33. # l.e.galup  9-20-02
  34. #
  35. # Modified by Eric Wing.
  36. # Added code to assist with automated building by using environmental variables
  37. # and providing a more controlled/consistent search behavior.
  38. # Added new modifications to recognize OS X frameworks and
  39. # additional Unix paths (FreeBSD, etc).
  40. # Also corrected the header search path to follow "proper" SDL guidelines.
  41. # Added a search for SDL2main which is needed by some platforms.
  42. # Added a search for threads which is needed by some platforms.
  43. # Added needed compile switches for MinGW.
  44. #
  45. # On OSX, this will prefer the Framework version (if found) over others.
  46. # People will have to manually change the cache values of
  47. # SDL2_LIBRARY to override this selection or set the CMake environment
  48. # CMAKE_INCLUDE_PATH to modify the search paths.
  49. #
  50. # Note that the header path has changed from SDL2/SDL.h to just SDL.h
  51. # This needed to change because "proper" SDL convention
  52. # is #include "SDL.h", not <SDL2/SDL.h>. This is done for portability
  53. # reasons because not all systems place things in SDL2/ (see FreeBSD).
  54.  
  55. #=============================================================================
  56. # Copyright 2003-2009 Kitware, Inc.
  57. #
  58. # Distributed under the OSI-approved BSD License (the "License");
  59. # see accompanying file Copyright.txt for details.
  60. #
  61. # This software is distributed WITHOUT ANY WARRANTY; without even the
  62. # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  63. # See the License for more information.
  64. #=============================================================================
  65. # (To distribute this file outside of CMake, substitute the full
  66. #  License text for the above reference.)
  67.  
  68. # message("<FindSDL2.cmake>")
  69.  
  70. SET(SDL2_SEARCH_PATHS
  71.     ~/Library/Frameworks
  72.     /Library/Frameworks
  73.     /usr/local
  74.     /usr
  75.     /sw # Fink
  76.     /opt/local # DarwinPorts
  77.     /opt/csw # Blastwave
  78.     /opt
  79.     ${SDL2_PATH}
  80. )
  81.  
  82. FIND_PATH(SDL2_INCLUDE_DIR SDL.h
  83.     HINTS
  84.     $ENV{SDL2DIR}
  85.     PATH_SUFFIXES include/SDL2 include
  86.     PATHS ${SDL2_SEARCH_PATHS}
  87. )
  88.  
  89. if(CMAKE_SIZEOF_VOID_P EQUAL 8)
  90.     set(PATH_SUFFIXES lib64 lib/x64 lib)
  91. else()
  92.     set(PATH_SUFFIXES lib/x86 lib)
  93. endif()
  94.  
  95. FIND_LIBRARY(SDL2_LIBRARY_TEMP
  96.     NAMES SDL2
  97.     HINTS
  98.     $ENV{SDL2DIR}
  99.     PATH_SUFFIXES ${PATH_SUFFIXES}
  100.     PATHS ${SDL2_SEARCH_PATHS}
  101. )
  102.  
  103. IF(NOT SDL2_BUILDING_LIBRARY)
  104.     IF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
  105.         # Non-OS X framework versions expect you to also dynamically link to
  106.         # SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms
  107.         # seem to provide SDL2main for compatibility even though they don't
  108.         # necessarily need it.
  109.         FIND_LIBRARY(SDL2MAIN_LIBRARY
  110.             NAMES SDL2main
  111.             HINTS
  112.             $ENV{SDL2DIR}
  113.             PATH_SUFFIXES ${PATH_SUFFIXES}
  114.             PATHS ${SDL2_SEARCH_PATHS}
  115.         )
  116.     ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
  117. ENDIF(NOT SDL2_BUILDING_LIBRARY)
  118.  
  119. # SDL2 may require threads on your system.
  120. # The Apple build may not need an explicit flag because one of the
  121. # frameworks may already provide it.
  122. # But for non-OSX systems, I will use the CMake Threads package.
  123. IF(NOT APPLE)
  124.     FIND_PACKAGE(Threads)
  125. ENDIF(NOT APPLE)
  126.  
  127. # MinGW needs an additional link flag, -mwindows
  128. # It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -mwindows
  129. IF(MINGW)
  130.     SET(MINGW32_LIBRARY mingw32 "-mwindows" CACHE STRING "mwindows for MinGW")
  131. ENDIF(MINGW)
  132.  
  133. IF(SDL2_LIBRARY_TEMP)
  134.     # For SDL2main
  135.     IF(NOT SDL2_BUILDING_LIBRARY)
  136.         IF(SDL2MAIN_LIBRARY)
  137.             SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP})
  138.         ENDIF(SDL2MAIN_LIBRARY)
  139.     ENDIF(NOT SDL2_BUILDING_LIBRARY)
  140.  
  141.     # For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa.
  142.     # CMake doesn't display the -framework Cocoa string in the UI even
  143.     # though it actually is there if I modify a pre-used variable.
  144.     # I think it has something to do with the CACHE STRING.
  145.     # So I use a temporary variable until the end so I can set the
  146.     # "real" variable in one-shot.
  147.     IF(APPLE)
  148.         SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa")
  149.     ENDIF(APPLE)
  150.  
  151.     # For threads, as mentioned Apple doesn't need this.
  152.     # In fact, there seems to be a problem if I used the Threads package
  153.     # and try using this line, so I'm just skipping it entirely for OS X.
  154.     IF(NOT APPLE)
  155.         SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})
  156.     ENDIF(NOT APPLE)
  157.  
  158.     # For MinGW library
  159.     IF(MINGW)
  160.         SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})
  161.     ENDIF(MINGW)
  162.  
  163.     # Set the final string here so the GUI reflects the final state.
  164.     SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found")
  165.     # Set the temp variable to INTERNAL so it is not seen in the CMake GUI
  166.     SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")
  167. ENDIF(SDL2_LIBRARY_TEMP)
  168.  
  169. # message("</FindSDL2.cmake>")
  170.  
  171. INCLUDE(FindPackageHandleStandardArgs)
  172.  
  173. FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)
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